Laser-induced jigsaw-like graphene structure inspired by Oxalis corniculata Linn.leaf  

作　　者：Wentao Wang Longsheng Lu Xiaoyu Lu Zhanbo Liang Biao Tang Yingxi Xie 

机构地区：[1]School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China [2]Guangdong Provincial Key Laboratory of Optical Information Materials and Technology,South China Normal University,Guangzhou 510006,China

出　　处：《Bio-Design and Manufacturing》2022年第4期700-713,共14页生物设计与制造（英文）

基　　金：supported by the Natural Science Foundation of Guangdong Province, China (No.2021B1515020087);the National Natural Science Foundation of China (No.51905178)。

摘　　要：The laser scribing of polyimide(PI, Kapton) film is a new, simple and effective method for graphene preparation. Moreover,the superhydrophobic surface modification can undoubtedly widen the application fields of graphene. Herein, inspired by the hydrophobic and self-cleaning properties of natural Oxalis corniculata Linn. leaves, we propose a novel bionic manufacturing method for superhydrophobic laser-induced graphene(LIG). By tailoring the geometric parameters(size, roughness and height/area ratio) and chemical composition, the three-dimensional(3D) multistage LIG, i.e., with micro-jigsaw-like and porous structure, can deliver a static water contact angle(WCA) of 153.5° ± 0.6°, a water sliding angle(WSA) of 2.5° ±0.5°, and great superhydrophobic stability lasting for 100 days(WCAs ≈ 150°). This outstanding water repellency is achieved by the secondary structure of jigsaw-like LIG, a porous morphology that traps air layers at the solid–liquid interface. The robust self-cleaning and anti-stick functions of 3D bionic and multistage LIG are demonstrated to confirm its great potential in wearable electronics.

关 键 词：Laser-induced graphene Oxalis corniculata Linn BIONIC Multistage structure Superhydrophobic surface 

分 类 号：TB17[生物学—生物工程] TQ127.11[化学工程—无机化工]